I started using it over 10 yrs ago...never kept penicillin or sharps in the house since,You know yourself if you get the dog out,and get it into them straight away,by the time you've driven home,swelling is gone,under a lamp for 2/3 days and good to go again,if I was still digging flat out,I wouldn't use anything else tbf ,have used it on dogs,ferrets and various BOP'S and even the daughters tortoise after a Russell dog mullered it,over the years